New generation rechargeable battery that technology of completely gel-type electrolyte with high ion conductivity brings

Lithium Polymer Battery

Presently, demand is rising rapidly for lightweight and thin portable information

&communication devices such as portable phones, portable audio systems and PDA (personal digital assistants). Similarly, there is demand for thin and lightweight batteries for use in these devices. SANYO's lithium polymer battery can be utilized in a wide variety of market products.

SANYO has developed, and introduces a lithium polymer battery that achieves an ultra-thin under 4mm with high performance through its own original technology and high reliability employing a complete gel-type electrolyte. Lithium polymer battery is new generation rechargeable battery to meet the demands of evolution to various, thinner and lighter battery.

●●Model of Gel-type Electrolyte

Structure model of electrolyte geled by cross-linked polymer

Electrolyte

Cross-linked Polymer

●●Structure of Lithium Polymer Battery

●●Cross section

Casing / Aluminum laminate film

Positive electrode collectorPositive electrode

Gel type electrolyte

Separator

Negative electrode

Negative electrode collector

●●Main Features

●High Performance and High
Reliability with Newly Developed
Complete Gel Type Electrolyte

The newly developed polymer electrolyte obtains superb long life reliability, featuring more than 500 recharging cycles while also achieving high performance (gravimetric energy density of 166Wh/kg & volumetric energy density of 348Wh/l).

●Excellent Discharge
Characteristics that Allow for
Discharge at 20°C

Typical points of weakness for lithium polymer batteries were its load and temperature characteristics. This newly developed polymer electrolyte possesses high ion conductivity even at low temperatures, thus making possible discharges at 20°C.

●Achieves an Ultra-Thin Type
Thickness of Under 4mm

It was possible to achieve both an ultra-thin type thickness of under 4mm and obtain high leakage-resistance even when utilizing thin and light aluminum laminated film as the exterior packaging material because the electrolyte is completely gel-type.